There's a guy in Ipswich who walks around the town talking to his invisible friend. That might not be particularly unusual (I walk around the house having conversations with myself, using two different names, all of the time) but what is definitely weird is that this guy looks exactly the same as when I first saw him about 45 years ago. He hasn't aged a single day!
In the small town where I live, we've got Cyril. He's a lovely old boy who dresses flamboyantly and always talks about himself in the third person. (e.g. "Cyril doesn't like that". "Cyril wonders if you'll buy him a drink"). He carries a mandolin everywhere he goes, even though he can hardly play it. He gets away with all sorts of things, such as "accidentally" picking up someone else's drink, or their change, from the bar. Even when his hand "accidentally" makes contact with a member of the opposite sex, everyone (including the local police) just smiles and says 'It's only Cyril'. He plays the simpleton with an expertise which few professional actors could match but, when you get to know him, he's actually incredibly intelligent.
I used to work at a railway station where one of our regular passengers was an Afro-Caribbean lady who wore brightly coloured clothes and loved singing and dancing on the platforms, sometime for hours. Inexperienced staff would be perplexed and wonder whether to call the Transport Police. Those of us 'in the know' simply took her in our arms and danced with her, all of the way to the exit!
Chris